Hot-air furnace



Sept. .21 1926.

* v. FLAUS HOT AIR FURNACE Filed Feb. 18. 1926 Patented Sept.- 21, 1926.

UNIT/QED sra'rssf vrc ron FLAUS, or, WOODLAWN, PENNSYLVANIA.

nor-Am FURNACE.

Application filed February 18, 1926. Serial No. 89,035.

This invention relates to furnaces and more in particular to hot airheating furnaces for dwellings.

As is well known, in most hot air furnaces as built nowadays, the gasesof combustion are discharged through the chimney with such rapidity thatthe greater part of heat is lost, thereby causing a great waste of fuel.

The primary object of this invention is to provide a hotair furnace inwhich the'gases of combustion may be retarded in their travel up thechimney a sufficient time to enable them to give up most of their heatto the heating-air.. Another object of this invention is to provide afurnace which is builtin such a manner as to act as a heat storageplant, after the supply of heat has been interrupted. A further objectof this invention is to provide a hot air heating plant in which the airis heated by the furnace proper as well as by the chimney. Still afurther object of this invention is to provide 'a furnace which issimple inconstruction and design and which can be manufactured frommaterials readily available anywhere, and at low cost. Additionalfeatures and ad-' vantages of this invention will appear from thefollowing description, considered in connection with 1 the accompanyingdrawing forming part of this application and in gasesinta the smokechamber 6;

Fig. .1 is a longitudinal section taken through the hot air furnace.

Fig. 2 is a fragmentary perspective view showing especially the outsideappearance of chimney and flue portion of the furnace.

Fig. 3 is a'detail view, partly'in section, showing a by-pass pipe usedin the chimney.

Fig. 4. is a view showing a section taken on line 4-4 in Fig. 1.

Fig. 5 represents a section taken on line 5-5, Fig. 1. V

' Fig. 6 is a cross-section showing a modified construction of a chimneyand air flues used in my invention.

' Referring to the various figures, my hot air furnace comprises aheating element 1, the shell of which is made of cast iron or othersuitable heat-radiating material, pos sessin'g a grate 2 uponwhichthefuelis burntand a removable baffle-plate 21 slidably mounted on therails'22 formed on the shell. In-this baffle-plate are provided'apertures 23 for the passage of the comlgustirp n front of said shell aresuitably located the I i usual fuel door 3 and the" ash door 4. The 210p5 of the shell is closed and preferably Built above'the top '5isthechimney 7 ATENT caries.

which'is vertical and perfectly straight and which traverses the variousfloors of the dwelling and discharges "the combustion gases above theroof thereof. This chimney is built of brick or'other suitable buildingmaterial allowing the transmission of heat therethrough, while atthesame time also adapted to retain the once imparted heat foraconsiderable time. The lower end of the chimney is built upon suitablesupports such as angle irons or the cross-beams 24, made preferably ofrefractory material and placed a short distance above the'heatingelement to enable the removal of the latter without disturbing thechimney. The bottom o f the latteris closed up by the partition 9 toprevent rain-water and soot from fallingon'top of the cast iron heatingelement, thus corroding the same and vitiating the heating air. 'Aclean-out door 25' is shown for the removal of all impurities which mayhave accumulated on the bottom of the chimney.

' The gases of combustion are led from the smoke chamber6 into thechimney by means of a by-pass pipe '10, made of any desired openings 11and 12 positioned respectively V and suitable materialfwhich connectsthein'the back of the smoke-chamber '6 and a certain distance above thebottom'9fof the chimney. The by-pass is also provided with a damper 13whereby the flow of-the combustion gases into the-chimney may beregulated to suit climatic conditions .and

the kind" of fuel used, or completelystopped'. The bypass and the damperalso introduce, of course, a certain and permanent resistance againstthe velocity of travel of the combustion gases, so that the latterwill'remain for a longer period injthe heating element, thereby favoringa more perfect transmission of heat to the'heating-air.

The latter is introduced through suitable inlet apertures 14 into theheating-chamber 15 which is made by building around the heating element1 a brick structure represented by the walls 16 and the top 17 As theair is heated by'the shell of the heating element, ittravelsupwardly inthe air flues 18 which run alongside the chimney '7 and which are alsoformed by bricksvalls, as

plainly shown in the variousfigures. It will be seen fiomiFig; 1 that,on account of leaving a certain space between the top 5 of the shell andthe lower end of the chimney, the top 5, (which is the-hottest part ofthe heat-- ing element) radiates its full share of heat to the air,thereby enabling a complete use i of the whole surface of the heating,element '1. This feature also contributesto better equalization of theheat inthe air and a better circulation f-the latter around the heatingielement,

At every floor of the dwelling, suitable hot air outlets 19,, havingadjustable registers 20 are provided. It will be readily understood thatthis construction, the air whichhas been heated'inthe-heating chamber 15will also absorb a considerable amount of heat from thesides ofthechimney. This .fea ture, in itself affords a greatsavi-ng offuel,

as comparedto old types of hot/air furnaces wherethe airheated by theheating element loses .a good amount of its heat in its upward travel,to the variou fiQOrs. The hot air fines are, of course, carried onlyhigh enoughio supply the uppermost story with heat; they are thereforeclosed at the top by additional brick work, as .ShOyvn especially inFig. '1.

- ed by founseparate air-fines.

. Where a great number-of roonisare to be 7 heated, especially if saidreomsare situated atdifferent levels, it maybe fonnd desirable to useseparate hpt air fines for the varions rooms oixfloprs. In this case,instead of usi g n ya fi a h w i: .l e's L and 5 especially, the chimneymay be sur- "rounded with fines on allsides, as suggested in Fig. 6,which showsa chimney snrroundrom th il l ter constrnctionit will also henoted that an even greater economy of fuel, respectively a greaterheating efiiciency,. nay be derived on account of surrounding thechimney withv air flueson ,all sides.

A hot .air fiirna ce built according to the' above, described invention,.enablesthe rapid heating ofahouse because, as the fire in. the heatingelementl is started, the air will be quickly heated in ,the heatingchamber by the shell of said heating element and reach the Various roomsrapidly. Asthe furnace keeps on burning fuel the walls o fthe chimney aswell as of the air-ducts become also well heated, so that when-the fireis discon tinued, as is oftenv doneover night the various brick wallswill release their absorbed heatandmaintainthewhole houseat a com-.fortable v--temperature until the following 7 j mornin While Ihaveillustrated and described the preferred (embodiment of any .invention,and

one which I have foundbyectual use to be yerygpractical, it may-befounddesirablein ti1ne;tomake slight changes in.- the construc- 7 tion andarrangement of the details of my nv nt en, a d I d tQ in lud i h pallsuch variationsas within the scope of the'appended claims.

I claim:

1 In a-"hot air furnace, the combination of a heating element having agrate and a shell with a closed top; an air-chamber surrounding saidelement; a vertical chimney having a closed bottom positioned a distanceabo e, the top of the heat-ingelementya pluralityof hot air ductsdisposed alongside of said chimney and in coinmuni-v cation with saidair chamber; ai -removable baffle-plate adapted to divide the .SpaCQabove thegrate-of, said heating element into a. cgmbustion chamber and asmolieechamber positionedabove thelatter, said battle-plate havingapertures to establish communicat o e we n a d ham e a a ypas Pipe tlas.d to connect. sa d, ismokec mber with said chimney. j

2. Inahot air furnace, thecoinbinatipn of a heating element having agrate and a shell with a closed; top; an air-chamber surchamber withsaid chimney, and rails posi ,tl OIIQCl inside-the ,shell of' theheating element vfor slidably supporting said hatileplate.

3. In a hot air-furnace the combination of a heating element having avgrate and a a shell withaclosedtop; an air-chamber sury rounding saidheating element; a vertical chimney having a closed bottom positioned adistance. aboVe-fthe top. of the heating element; aplurality ofhot airducts disposed V alongside of said chimney; and in communication withsaid air-chamber; a removable baffle-plate adapted to divide the spaceabove ,thegrate of said heating element into a-cq lbus ell-ehambe an a sa hambe positioned above theflatterhsaid baffle-plate having apeigtures.to establish communication. between lsaid Ch mbe a ok Q le connectionpositioned on a lateral side .Of said smoke-chamber, and a by-pass pipecommunicating with said outlet connection and adapted-t0 connect .said.smoke'-chamber with .said .chimney' -r g a l H I 1; }hQ1' i furna e, thec m i a ion .of aheating element having a grate and a v.shell withalelosed top.; a brick structure 1 built around the heating element andadapted to form an air-chamber; a vertical chimney having a closedbottom positioned a distance above the top of the heating element; aplurality of cross-beams carried by said brick structure for supportingsaid chimney; a plurality of hot air ducts disposed alongside of saidchimney and in communication with said air-chamber; means fordistributing the air heated in the air chamber to the rooms of adwelling; a removable baflle-plate adapted to divide the space above thegrate of said heating element into a combustion-chamber and asmoke-chamber positioned above the latter,

15 said battle-plate having apertures to estabber; a bypasspipecommunicating With said outlet connection and adapted to connectsaid smoke-chamber With said chimney,

and means positioned in the bypass pipe to regulate the flow ofcombustion gases into said chimney. U

ture.

In testimony whereof I aflix' signa- VICTOR FLAUS. j

